win_ldr4_auto

YARA detection rule by Felix Bilstein - yara-signator at cocacoding dot com

Detects win.ldr4.

rule win_ldr4_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.ldr4."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ldr4"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 8945f8 bbff0f0000 0fb702 c1e80c 83f803 7414 83f80a }
                                                                                                
        $sequence_1 = { 68ce37a4f4 81e600f0ffff e8???????? 85c0 }
                                                            
        $sequence_2 = { e8???????? 85c0 7414 8d4de4 51 ff75f4 8b4d08 }
                                                                                                
        $sequence_3 = { 8945f8 85c0 0f84b2010000 ff750c 50 ff15???????? 837d1000 }
                                                                                                
        $sequence_4 = { eb03 6a7f 5f 85ff 75a7 8b7638 85f6 }
                                                                                                
        $sequence_5 = { c20400 55 8bec 51 51 8b4d08 8b413c }
                                                                                                
        $sequence_6 = { c20400 0fb6442404 56 33f6 c1e004 57 }
                                                                                    
        $sequence_7 = { ffd6 8bf0 8975fc 85f6 7478 ff7508 e8???????? }
                                                                                                
        $sequence_8 = { 57 895df4 e8???????? 83c40c 6a02 58 668907 }
                                                                                                
        $sequence_9 = { 8b4514 8930 eb0e 3945fc 7409 ff75fc }
                                                                                    
    condition:
        7 of them and filesize < 117760
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

932f971b-1a82-49a4-ad62-457c81671be4

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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